The Effect of Adding a Local Anesthetic to Transforaminal Epidural Injection in Cervical Disc Herniation.

The interventional treatment procedure is performed in the operating room under sterile conditions, in the supine position, using a C-arm fluoroscopy device. The first intervertebral foramen visible under fluoroscopy is C2-C3. Once the appropriate cervical space is identified, the C-arm fluoroscopy device is directed obliquely to 45-65 degrees until the cervical neural foramen is visualized as a circle. The cannula insertion site is determined. The skin and subcutaneous tissue are anesthetized with 2% lidocaine. A 5 cm long RF cannula with a 5 mm active tip is advanced towards the 6 o'clock position of the neural foramina. The needle is advanced until it contacts the superior facet joint, then guided into the foramen. After entering the foramen, to avoid direct intrathecal or spinal cord damage, the needle is advanced to the facet column and into the epidural space while anteroposterior views are obtained with fluoroscopy. Approximately 0.5 mL of non-ionizing contrast agent is injected to confirm needle placement. The spread of radiopaque material, which adheres to the periradicular membrane, is observed both within the foramen and around the nerve root during fluoroscopy. If abnormal sensation, vibration, or pain is observed with a stimulus less than 0.7 Volts for sensory stimulation, or if a pulse is felt in the arm with a stimulus less than 2.0 Volts for motor stimulation, it is assumed that the catheter needle has been placed near the dorsal root ganglion. Subsequently, patients in Group 1 are given 4 mg dexamethasone + 20 mg lidocaine, and patients in Group 2 are given 4 mg dexamethasone. The radiofrequency generator is adjusted so that the temperature of the catheter needle tip does not exceed 42 ºC, and it is subjected to pulsed radiofrequency treatment for 4 minutes. Patient response will be determined based on the reduction in pain at follow-up examinations at 1, 3, and 6 months after the procedure as follows: good response > 50% reduction, poor response < 50% reduction, or no change, no response.

Inclusion criteria

• Patients consisted of those who presented to our outpatient clinic with neck and arm pain, who had received medical and/or physical therapy but whose symptoms did not improve.

Exclusion criteria

• The procedure was not performed on those with neurological deficits requiring surgery, those with known allergies to lidocaine and dexamethasone, those who had recently undergone head and neck surgery, diabetic patients with impaired blood sugar regulation, those who had received epidural steroid injections or depot steroids within the last 15 days, those with progressive neurological deficits, those with coagulation disorders (INR > 1.5; platelets < 100,000/mm³), those with any lesion or infection in the cervical region that would prevent epidural intervention, and pregnant women.